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FILE - In this publicity file photo provided by Sony Pictures, Daniel Craig, right, appears with Eva Green in the 2006 James Bond film, "Casino Royale." Whatever their role, Bond girls still must be inarguably beautiful. (AP Photo/Sony Pictures/Jay Maidment, File)

FILE - In this publicity file photo provided by Sony Pictures, Daniel Craig, right, appears with Eva Green in the 2006 James Bond film, "Casino Royale." Whatever their role, Bond girls still must be inarguably beautiful. (AP Photo/Sony Pictures/Jay Maidment, File)

The evolution of the 'Bond girl'

Who qualifies as a Bond girl has changed over the years, as the

blue-eyed, buxom blonde has given way to more diverse leading ladies,

including Michelle Yeoh ("Tomorrow Never Dies") and Halle Berry ("Die Another Day"). Modern Bond girls also present a more formidable challenge to the suave secret agent.